2021년 9월 - September 2021
| 날짜 / Date | 행사 / Event | 시간 / Time* | 장소 / Place | 링크 / Link | |
| 📰 | 2021.09.01 | THE BIG ISSUE 258호 | - | - | WATCH |
| 🎥 | 2021.09.01 | Happy Birthday for September | 12:00 PM | loonatheworld app | WATCH |
| 🎥 | 2021.09.02 | "Not Friends" MV Teaser | 6:00 PM | Youtube | WATCH |
| 💿 | 2021.09.03 | LOONA X RYAN JHUN - Not Friends | 6:00 PM | - | LISTEN |
| 🎥 | 2021.09.03 | LOONA X RYAN JHUN - Not Friends MV | 6:00 PM | Youtube | WATCH |
| 🎥 | 2021.09.04 | "Not Friends" Special Clip | 12:00 PM | Youtube | WATCH |
| 📰 | 2021.09.06 | Noblesse MEN Vol.5 | - | - | WATCH |
| 📸 | 2021.09.07 | HULA HOOP/StarSeed〜カクセイ〜 Teaser | 6:00 PM | WATCH | |
| 📻 | 2021.09.07 | 소문의 아이들 Ep.31 | 8:00 PM | Naver NOW | WATCH |
| 📻 | 2021.09.13 | 심야아이돌 | 10:00 PM | Naver NOW | WATCH |
| 📺 | 2021.09.14 | LOONA SHOWROOM | 8:00 PM | Showroom App | WATCH |
| 💿 | 2021.09.15 | HULA HOOP/StarSeed〜カクセイ〜 | 12:00 AM | - | LISTEN |
| 🖥️ | 2021.09.16 | 2021 뉴시스 K-Expo | 5:00 PM | Youtube | WATCH |
| 🎥 | 2021.09.17 | LOONA Japan Debut Teaser | 6:00 PM | Youtube | WATCH |
| 🎥 | 2021.09.20 | 이달소 의 2021년 추석 인사 영상 | 6:00 PM | WATCH | |
| 📻 | 2021.09.20 | Studio문나잇 | 9:00 PM | Naver NOW | WATCH |
| 📸 | 2021.09.28 | 스트릿 우먼 파이터 Ep.5 | 10:20 PM | MNET | WATCH |
* KST / Korean time
이달의 소녀 [&]
프로모션 활동에 / Promotion activities →
[&] - 음악방송 / Music broadcasts →